The EPA granted an emergency waiver permitting the nationwide sale of a fuel blend with higher amounts of ethanol through the summer months.

E15 gasoline generally costs at least 10 cents less a gallon than E10 gasoline, but the EPA had previously prohibited its sale during the summer over concerns that its use during the summer driving season could increase smog.

The Trump administration announced it is allowing nationwide sales of higher-ethanol E15 gasoline this summer, a move it said would would keep gasoline prices low and support US agriculture.